void cmd_add(WINDOW *window, ToxWindow *self, Tox *m, int argc, char (*argv)[MAX_STR_SIZE])
{
char *errmsg;
if (argc < 1) {
errmsg = "Invalid syntax.";
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, errmsg);
return;
}
char *id = argv[1];
char msg[MAX_STR_SIZE];
if (argc > 1) {
char *temp = argv[2];
if (temp[0] != '\"') {
errmsg = "Message must be enclosed in quotes.";
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, errmsg);
return;
}
++temp;
temp[strlen(temp) - 1] = '\0';
snprintf(msg, sizeof(msg), "%s", temp);
} else {
char selfname[TOX_MAX_NAME_LENGTH];
uint16_t n_len = tox_get_self_name(m, (uint8_t *) selfname);
selfname[n_len] = '\0';
snprintf(msg, sizeof(msg), "Hello, my name is %s. Care to Tox?", selfname);
}
char id_bin[TOX_FRIEND_ADDRESS_SIZE] = {0};
uint16_t id_len = (uint16_t) strlen(id);
/* try to add tox ID */
if (id_len == 2 * TOX_FRIEND_ADDRESS_SIZE) {
size_t i;
char xx[3];
uint32_t x;
for (i = 0; i < TOX_FRIEND_ADDRESS_SIZE; ++i) {
xx[0] = id[2 * i];
xx[1] = id[2 * i + 1];
xx[2] = '\0';
if (sscanf(xx, "%02x", &x) != 1) {
errmsg = "Invalid ID.";
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, errmsg);
return;
}
id_bin[i] = x;
}
cmd_add_helper(self, m, id_bin, msg);
} else { /* assume id is a username@domain address and do DNS lookup */
dns3_lookup(self, m, id_bin, id, msg);
}
}
void cmd_add(WINDOW *window, ToxWindow *self, Tox *m, int argc, char (*argv)[MAX_STR_SIZE])
{
if (argc < 1) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Tox ID or address required.");
return;
}
const char *id = argv[1];
char msg[MAX_STR_SIZE];
if (argc > 1) {
if (argv[2][0] != '\"') {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Message must be enclosed in quotes.");
return;
}
/* remove opening and closing quotes */
char tmp[MAX_STR_SIZE];
snprintf(tmp, sizeof(tmp), "%s", &argv[2][1]);
int len = strlen(tmp) - 1;
tmp[len] = '\0';
snprintf(msg, sizeof(msg), "%s", tmp);
} else {
char selfname[TOX_MAX_NAME_LENGTH];
tox_self_get_name(m, (uint8_t *) selfname);
size_t n_len = tox_self_get_name_size(m);
selfname[n_len] = '\0';
snprintf(msg, sizeof(msg), "Hello, my name is %s. Care to Tox?", selfname);
}
char id_bin[TOX_ADDRESS_SIZE] = {0};
uint16_t id_len = (uint16_t) strlen(id);
/* try to add tox ID */
if (id_len == 2 * TOX_ADDRESS_SIZE) {
size_t i;
char xx[3];
uint32_t x;
for (i = 0; i < TOX_ADDRESS_SIZE; ++i) {
xx[0] = id[2 * i];
xx[1] = id[2 * i + 1];
xx[2] = '\0';
if (sscanf(xx, "%02x", &x) != 1) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Invalid Tox ID.");
return;
}
id_bin[i] = x;
}
cmd_add_helper(self, m, id_bin, msg);
} else { /* assume id is a username@domain address and do DNS lookup */
dns3_lookup(self, m, id_bin, id, msg);
}
}
/* Does DNS lookup for addr and puts resulting tox id in id_bin. */
void *dns3_lookup_thread(void *data)
{
ToxWindow *self = t_data.self;
char inputdomain[MAX_STR_SIZE];
char name[MAX_STR_SIZE];
int namelen = parse_addr(t_data.addr, name, inputdomain);
if (namelen == -1) {
dns_error(self, "Must be a Tox ID or an address in the form username@domain");
killdns_thread(NULL);
}
char DNS_pubkey[DNS3_KEY_SIZE];
char domain[MAX_DOMAIN_SIZE];
int match = get_domain_match(DNS_pubkey, domain, inputdomain);
if (match == -1) {
dns_error(self, "Domain not found.");
killdns_thread(NULL);
}
void *dns_obj = tox_dns3_new((uint8_t *) DNS_pubkey);
if (dns_obj == NULL) {
dns_error(self, "Core failed to create DNS object.");
killdns_thread(NULL);
}
char string[MAX_DNS_REQST_SIZE + 1];
uint32_t request_id;
int str_len = tox_generate_dns3_string(dns_obj, (uint8_t *) string, sizeof(string), &request_id,
(uint8_t *) name, namelen);
if (str_len == -1) {
dns_error(self, "Core failed to generate DNS3 string.");
killdns_thread(dns_obj);
}
string[str_len] = '\0';
u_char answer[PACKETSZ];
char d_string[MAX_DOMAIN_SIZE + MAX_DNS_REQST_SIZE + 10];
/* format string and create dns query */
snprintf(d_string, sizeof(d_string), "_%s._tox.%s", string, domain);
int ans_len = res_query(d_string, C_IN, T_TXT, answer, sizeof(answer));
if (ans_len <= 0) {
dns_error(self, "DNS query failed.");
killdns_thread(dns_obj);
}
char ans_id[MAX_DNS_REQST_SIZE + 1];
/* extract TXT from DNS response */
if (parse_dns_response(self, answer, ans_len, ans_id) == -1)
killdns_thread(dns_obj);
char encrypted_id[MAX_DNS_REQST_SIZE + 1];
int prfx_len = strlen(TOX_DNS3_TXT_PREFIX);
/* extract the encrypted ID from TXT response */
if (strncmp(ans_id, TOX_DNS3_TXT_PREFIX, prfx_len) != 0) {
dns_error(self, "Bad DNS3 TXT response.");
killdns_thread(dns_obj);
}
memcpy(encrypted_id, ans_id + prfx_len, ans_len - prfx_len);
if (tox_decrypt_dns3_TXT(dns_obj, (uint8_t *) t_data.id_bin, (uint8_t *) encrypted_id,
strlen(encrypted_id), request_id) == -1) {
dns_error(self, "Core failed to decrypt DNS response.");
killdns_thread(dns_obj);
}
pthread_mutex_lock(&Winthread.lock);
cmd_add_helper(self, t_data.m, t_data.id_bin, t_data.msg);
pthread_mutex_unlock(&Winthread.lock);
killdns_thread(dns_obj);
return 0;
}